Supplemental Guarantor Information (Supplemental Condensed Consolidated Statement Of Cash Flows) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	$ (92,999)	$ (80,892)
Net cash provided by/(used in) investing activities	(6,215)	(35,248)
Financing activities
Borrowings under revolving credit facilities	767,600	305,000
Payments on revolving credit facilities	(758,100)	(175,000)
Extinguishments of debt assumed in business combination		(94,231)
Proceeds from issuance of senior notes due 2027	500,000
Extinguishment of senior notes due 2022	(391,942)
Debt issuance costs	(5,728)	(3,521)
Proceeds from issuance of insurance premium notes and other	9,301
Net proceeds from mortgage repurchase facilities	(3,805)	4,679
Net proceeds from issuances of common stock	2,663	14,309
Repurchases of common stock upon vesting of stock based compensation	(3,434)	(4,788)
Repurchases of common stock under our stock repurchase program	(1,439)
Principal payments on insurance notes payable	(17,586)
Net cash provided by (used in) financing activities	97,530	46,448
Net increase (decrease)	(1,684)	(69,692)
Cash and cash equivalents and Restricted cash, Beginning of period	36,441	93,713
Cash and cash equivalents and Restricted cash, End of period	34,757	24,021
Cash and cash equivalents	31,704	19,482	$ 32,902
Restricted Cash	3,053	4,539
Elimination Entries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(450)	(7,119)
Net cash provided by/(used in) investing activities	43,459	196,514
Financing activities
Payments from (and advances to) parent/subsidiary	(43,459)	(196,514)
Net cash provided by (used in) financing activities	(43,459)	(196,514)
Net increase (decrease)	(450)	(7,119)
Cash and cash equivalents and Restricted cash, End of period	(450)	(7,119)
Cash and cash equivalents	(450)	(7,119)
Century [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(60,874)	(28,930)
Net cash provided by/(used in) investing activities	(45,677)	(68,490)
Financing activities
Borrowings under revolving credit facilities	767,600	305,000
Payments on revolving credit facilities	(758,100)	(175,000)
Extinguishments of debt assumed in business combination		(94,231)
Proceeds from issuance of senior notes due 2027	500,000
Extinguishment of senior notes due 2022	(391,942)
Debt issuance costs	(5,728)	(3,521)
Net proceeds from issuances of common stock	2,663	14,309
Repurchases of common stock upon vesting of stock based compensation	(3,434)	(4,788)
Repurchases of common stock under our stock repurchase program	(1,439)
Payments from (and advances to) parent/subsidiary		(583)
Net cash provided by (used in) financing activities	109,620	41,186
Net increase (decrease)	3,069	(56,234)
Cash and cash equivalents and Restricted cash, Beginning of period	2,183	56,234
Cash and cash equivalents and Restricted cash, End of period	5,252
Cash and cash equivalents	5,252		2,183
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(23,182)	(43,880)
Net cash provided by/(used in) investing activities	(4,115)	(163,120)
Financing activities
Proceeds from issuance of insurance premium notes and other	9,301
Payments from (and advances to) parent/subsidiary	32,462	189,959
Principal payments on insurance notes payable	(17,586)
Net cash provided by (used in) financing activities	24,177	189,959
Net increase (decrease)	(3,120)	(17,041)
Cash and cash equivalents and Restricted cash, Beginning of period	4,006	28,044
Cash and cash equivalents and Restricted cash, End of period	886	11,003
Cash and cash equivalents		8,343	2,101
Restricted Cash	886	2,660
Non Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by/(used in) operating activities	(8,493)	(963)
Net cash provided by/(used in) investing activities	118	(152)
Financing activities
Net proceeds from mortgage repurchase facilities	(3,805)	4,679
Payments from (and advances to) parent/subsidiary	10,997	7,138
Net cash provided by (used in) financing activities	7,192	11,817
Net increase (decrease)	(1,183)	10,702
Cash and cash equivalents and Restricted cash, Beginning of period	30,252	9,435
Cash and cash equivalents and Restricted cash, End of period	29,069	20,137
Cash and cash equivalents	26,902	18,258	$ 28,618
Restricted Cash	$ 2,167	$ 1,879